Typewriter attachment



Feb. 22, 1938.

J. E. EUTH TYPEWRITER ATTACHMENT Filed Jan. 6, 1936 2 Sheets-Sheet l Feb. 22, 1938. J, EUTH 2,109,288

TYPEWRITER ATTACHMENT Filed Jan. '6, 1956 2 Sheets-Sheet 2 mm Mg @N Q4 mm Qf 5H mm m 1 15/ V w Patented 5:11.22, 1938 mnwan'na ATTACHMENT John E. Enth, Chicago, Ill., assignor to United Autogirsaphic Register 00., a corporation of 1mm Application January s, 1936, Serial No. 57,821

I 10 Claims.

This invention relates to typewriters adapted to fill in forms on continuous-form stationery, and more particularly to an improved device and method for holding carbon-slips interleaved with 5 the stationery strips while the completed set of forms is advanced beyond the area served by the carbon-slips. The primary object of the invention is to provide. a carbon-holder which is slidably mounted 10 in the rear of the platen, so as to move forwardly with the stationery; and to provide means for holding the carbon-holder in its remote or rearmost position with respect to the platen, to facilitate the transfer of the carbon from an ad- 16 vanced to a succeeding set of forms.

A further object of the invention is to provide an inexpensive and light device which is readily attachable to a standard type'of machine when it is desired to use continuous-form stationery in 20 the machine.

A further object of the invention is to provide an improved method of manipulating interleaved carbon-slips in continuous-form stationery.

The invention is illustrated ima' preferred em- 25 bodiment in the 1 accompanying drawings, in

which- Fig. 1 is a side elevational view of the attachment, showing a platen roll and mounting means for the attachment, the typewriter being indi- 3o cated by dotted lines; Fig. 2 a broken front elevational view of the attachment and stationery illustrated in Fig. 1; Fig. 3 a plan view of a carbonholding blade showing a carbon-slip thereon and showing, brokenly, a shield for said carbon; Fig.

35 4 a broken plan view of one end of the blade shown in Fig. 3, with the carbon-slip unwrapped;- Fig. 5 a. front elevational view of the device shown in Fig. 2, with the stationery and carbon-slips removed; Fig. 6 a plan view of the housing frame 40 for the wind-up drum, with the cover in' raised position; Fig. 7 a broken sectional view taken as indicated at lines '|--I of. Fig. 8; Fig. 8 a sectional view taken as indicated at line 8 of Fig. '7; and

Fig. 9 a broken sectional view showing a modified 45 form of wind-up drum holding device.

In the embodiment illustrated, A designates a housing frame adapted to be detachably mounted on the shiftable platen carriage of a typewriter and equipped with a spring actuated wind-up roll 50 A; B a standard mounted on the housing frame and equipped at its remote end with a guide roller Bf; C a carbon-slip holder; and D a fabric belt or curtain connecting the carbon-holder C to the wind-up 'drum A. v

55 The device is adapted for use on. any standard typewriter, as indicated by dotted lines in Fig. 1, the typewriter having the usual shiftable platen carriage, rotatable platen roll l and associated presser means, not shown, for feeding the paper into writing position. The standard platen carriage is equipped with a guard or apron II, to which is bolted, or otherwise fastened, mounting hooks i2.

- The housing frame A is shown in the form of a sheet metal canister provided with a cover I3, 10 which is pivotally connected. to the bottom of the housing at I4. The cover is provided with a downwardly extending flange i5, which is adapted to be' engaged by screws I6 to hold the same in position. The front end of the canister is provided with strap brackets ll, which form sockets to receive the ends of the mounting hooks i2.

The wind-up drumA' is practically the same as an ordinary curtain rod drum and is supported in the frame by means of screws l8. The rod is hollow and is provided with a long suitably connected coil spring |9 to urge the drum to rotate in one direction. As shown in Figs. 6 and 7, one end of the drum is provided with a fixed head 20, in which is cut a deep thread to provide a helical slot 2|. One end of the slot is provided with suitable stop means, such as a notch 22, see Fig. 8. The housing frame A also contains a rock shaft 23, which is journaled on screws 24 and forms a sliding support for a pawl 25, which is non-rotatably mounted on the shaft. A spring 26 is provided to urge the pawl down into engagement with the slot 2|, and one end of the shaft is provided with an operating lever 21 to enable the pawl 'to be lifted from engagement with the notch 22 at will. The standard B is rigidly connected to the housing frame A and is adjustable longitudinally by means of an expansion joint 28. The remote end of the standard is provided with a crossbar 29, equipped at its end 40 portions with guide fingers 30, and serves to support the guide roller B.

The carbon-holder C comprises a cross member 3|, equipped at its end portions with slotted upwardly extending ears 32, which serve as keepers for the carbon supporting blades 33. The cross member 3| is further provided with guide members 34 for-directing the stationery. The carbon blades 33 preferably are formed of thin, flat, resilient metal and have resilient integrally formed tongues 35, under which the carbon paper or shield may be inserted. The lateral end portions of the blades are provided with ears 36, which may be sprung into the keepers 32 of the carbon-holder C. As shown in Fig. 2, a

'- with a finger piece 80. to facilitate moving the cross member 31 is provided to overlie the interleaved'stationery strips and has ears as to en-' gage the keepers 82. The member 81 is provided carbon-holder as desired.

Preferably, the belt D is formed of a light,

flexible fabric and-isconnected at one end to the rear/portion of the carbon holder C, vas indicated at II. The other end is attached to the.

wind-up roll A in any suitable manner, so that the spring if is enabled to. yieldingly draw the' carbon-holder,v into its uppermost position, indicated in Fig. 1. As the belt is wide, the carbonholder C will remain at right angles to its line of travel as it slides up and down the frame B.- When the spring is allowed to draw the carbonholder-to the uppermost position, the pawl ll will drop into the notch 22 and prevent the carbon-' holderfrom being drawn downwardly until the pawl has been raised by means of the lever 21. when the pawl is raised, there is usually sufilcient tension in the belt D to prevent the pawl from reengaging the notch 22, and it is not necessary to sum the carbon-holder downwardly while holding the lever. 21.

To load the machine for operation, the blades 3! are first provided with carbon-slips ll, and after the carbon has been folded over the rear edge of the .blade, the edge portions of the carbon may be inserted beneath the tongues 36. As shown in Figs. 2 and 3, the top blade may be provided with a shield 42, which extends downwardly a short distance with the carbon. The purpose of this shield will be described below. Continuous-form stationery 0, two strips being shown for the purpose of illustration, is draped over the guideroll B, and a carbon-slip interleaved therein with the ears. sprung into the keepers 32.

The stationery is then drawn down slightly be- I yond the ends of the carbon-slips, the carbonslips ending just short of the bight of the platen roll and presser means, and after releasing the carbon-holder by means of the lever TI, the loaded advanced set of forms is fed into writing position in the typewriter. The tension in -the spring I II is so adjusted that when the carbon-holder is released, the friction between the stationery and carbon is sufiicient to draw it downwardly with the stationery. After a set of forms has been filled in, the platen roll is backed up until the and thereby provides a very simple and accurate indicating device for this operation. The lever 21 is then depressed to release the carbon-holder, and the succeeding set of forms is then advanced into writing position. This operation will clear the completed set of forms sufllciently to permit them to be detached along their lines of weakening 45, provided between sets of forms.

In the modification illustrated in Fig. 9, instead of employing an automatic stop device, a friction clutch or gripping device is provided, which enables the wind-up drum to be locked at any desired position. The drum is provided with a arcades. v

spring 41 and fabric belt ll, which operates in the same way as the device described above. However, one end of the drumisprovided with a clutch face I. and a trunnion II, the latter bein adapted to slide in a recess Ii, provided in the center of a shiftable clutch face 52. The shiftable portion of the clutch is carried in a hollow boss 53, which is recessed, as indicated at M, to receive a'spring. II, which urges the clutch face 52 into engagement with the drum face 40. The

' outer end of the boss 83 is provided with a cam.

slot N, which is adapted to be engaged by a detent 81, carried by operating lever 88, which is fixed-to the movable portion of the clutch by means of, a screw ll. Thus, it will be understood that by moving the lever 58, the clutch faces will be separated, andthe drum is free to means provided in the preferred embodiment.

The foregoing detailed description is given for mounted on said carriage; a transfer-slip holder slidably mounted on said frame for movement to and from said platen roll: spring means for auto-.

matically moving said holder away when the platen roll is turned rearwardly; means forelocking said holder in a position remote from said platen;-

andvmanual means adjacent to said platen roll for releasing said locking means.

2. A device as specified in claim 1, in which the frame is equipped with a guide roll at its end remote from the platen, and the spring means comprises a spring actuated wind-up drum adiacent to the platen and connected to the transferslip holder by means of a belt passing over said guide roll. 3. A device as specified in claim 1, in which the locking means automatically holds the carbon holder when the latter reaches its remote position on the frame.

4. In 'a typewriter having a carriage with platen roll around which stationery strips interleaved with transfer-slips may be led: a spring actuated wind-up drum of the curtain roll type rotatably mounted on said carriage near said platen roll and adapted to draw yieldingly an associated transfer-slip holder away from said platen; a gripping device at one end of said drum adapted to engage said drum and prevent its rotation; and manually operable lever means for releasing said gripping device.

5. A device as specified in claim 4, in which the gripping device comprises. a friction cl'utch having a slidable head recessed to receive a trunnion provided on the wind-updrum, and the lever means includes cam'means for drawing the shiftable head axially away from said drum. v

6. In a. device of the character set'forth: a frame inwhich is journalied a wind-up drum; spring means urging rotation of said drum in but one direction; a worm at one end of said drum aifording a helical slotprovided near one end amazes frame in which is iou'rnalled awind-up drum;

spring means urging rotation of said drum in but one direction; a worm at one end of said drum affording a helical slot provided near one end with stop means; a shaft journalled in said frame adjacent to said drum; a pawl member slidably mounted on said shaft and having a detent adapt-v ed to travel in said slot and engage said stop means to restrain rotation of the drum in a backward direction; and manually operable means for raising saiddetent from stop means. i

8. In a device of the character set forth: a frame in which is journalled a wind-up drum; spring means urging rotation of said drum in but one direction; a worm at one end of said drum affording a helical slot provided near one end engagement with the with a notch; a rock shaft journalled in said frame adjacent to said drum; a pawl member non-rotatably mounted onsaid rock shaft for axial sliding movement thereon, said pawl member having a detent adapted to travel in said slot and engage in said notch to prevent backward rotation of the drum; spring-means on said rock shaft for urging said detent into engagement with the slot; and a lever on the shaft for lifting the detent from engagement with the stop-means.

9. In combination with a typewriter having a shiftable carriage provided with a platen roll: mounting means secured to said carriage; a housing frame having means for detachably engaging said mounting means; a springactuated wind-up.

drum iournalled in said housing and having at one end a helical slot provided with stop means; a detent pivotally mountedin said housing frame to travel in said slot and engage said stop means; manually operable means for releasing said detent from the stop means; a standard mounted on said housing frame and extending upwardly and rearwardlyfrom the platen; a guide roller and guide fingers provided at the remote end of said standardpa carbon-holder adapted to slide on said standard and to hold carbon-slips in interleaved relation with stationery strips led over the guide roller to said platen; and a fabric belt Passing over the guide roller and connecting the carbon-holder to said wind-up drum.

10. In a typewriter having a carriage with a platen roll around which stationery strips interleaved with transfer-slips may be led: a frame mounted on said carriage; a transfer-slip holder slidably mounted on said frame for movement to and from said platen roll, said transfer-slip holder having at each lateral end-portion a blade keeper, and a thin resilient blade having unitary spring tongues for engaging the transfer-slips V and having at its ends outwardly extending ears for engaging said keepers; means for moving said holder away from the platen; means for locking said holder remote from the platen; and means for releasing said locking means. i

JOHN E. EUTH. 

